Kinsler Handbook #32 May 2025

Kinsler Fuel Injection, Inc, 1834 THUNDERBIRD TROY, MICHIGAN 48084 U.S.A. www.Kinsler.com Phone (248) 362-1145 Fax (248) 362-1032 59 RAMTUBES KINSLER 180 DEGREE BELL SPUN ALUMINUM RAMTUBES Our 180 degree bell aluminum ramtubes are formed from 6061-0 alloy and have a nominal .070” thick wall. 180 degree bell ramtubes have consistent wall thickness and inside/outside diameters. These ramtubes use our special180 o tapered bell design for increased air flow. KINSLER TRADITIONAL BELL SPUN ALUMINUM RAMTUBES Kinsler big block Chev with 180 degree tapered bell ramtubes © 2025 How Do I Know What Size Ramtube I Need? Measuring ramtube length “ONLY” Measure the O.D. to verify ramtube adapter fitment. Kinsler identifies ramtube size by measuring the Inside Diameter of the base of the tube * Non-tapered, straight wall ramtube Our traditional bell spun aluminum ramtubes are made from 1100-0 alloy andhave a nominal .080” thickwall. These ramtubeswill have slight variations in wall thickness and inside/outside diameters. Part # Inside Diameter Maximum Length Machined Outside Diameter Bell Diameter 7806 2.0” 7” 2.150” 3.900” 7808 2.187” (2 3/16”) 9” 2.340” 4.110” 7813 2.250” (2 1/4”) 9” 2.365” 4.175” 7815 2.370” (2 3/8”) 9” 2.490” 4.280” 7817 2.437” (2 7/16”) 9” 2.565” 4.350” 7819 2.500” (2 1/2”) 9” 2.645” 4.410” 7821 2.625” (2 5/8”) 9” 2.748” *4.395” 7825 2.625” (2 5/8”) 9” 2.748” 4.900” 7824 2.680” (2 11/16”) 9” 2.785” 5.010” 7827 2.750” (2 3/4”) 9” 2.872” 5.070” 7830 2.812” (2 13/16”) 9” 2.938” 5.100” 7710 2.900” 9” 3.000” 5.230” 7833 3.0” 9” 3.100” 5.320” 7889 Machine 180 degree bell ramtube to length specified by customer 7896 Machine ramtube bell, notch for clearance for use on siamese to adapter 7900 Cut to specified length and Notch bell Part # Inside Diameter Maximum Length Nominal Outside Machined Outside Bell Diameter 7804 1.810" (1 6" 1.960" 1.930" 3.180" 7811-PT 2.250" (2 9" 2.365" 3.830" 7814-PT 2.375" (2 9" 2.490" 4.125" 7818-PT 2.500" (2 9" 2.645" 4.380" 7707 2.900" 9" 3.045" 2.998" 5.080" 7708 2.900" 11" 3.025" 2.998" 5.080" *Machine outside diameters may vary +/- .004 180 degree bell, trimmed to look like a Traditional bell ramtube Notched for Siamese fitment Limited Stock